Dough-mixer.



W. G. KIRCHHOFF.

-DOUGH MIXER.

APPLICATION FILED AUG-29, 1912.

- Patented Fe 5, 1916.

I 2 SHE ET ET I.

v yg W. G. KIRCHHOFF.

I nouen MIXER. APPLICATION FILED AUG-29, 191 2.

Patented Feb. 15, 1916.

2 SHEETSSHEET 2- THE COLUMBIA PLANOGRAPH 110.,- WASHINGTON, D. c

NIT D STATES PATENT OFF CE-s WILLIAM G. xmcnnorr, or s'r. .LOUIS, MIssouR-I, iessienon mo A EiaIQANBAK- RS macnmnnv COMPANY, or ST. LOUIS, MIssoUn n .eo zronnzuroiv or MIsso nIl DOUGH-MIXER:

Applicatiomfiled August 29, 1912.

To all whom it may concern: i

Be it known that 1, WILLIAM G.1(IRGH HOFF, a. citizen of theUnited States, residing at St. Louis, Missouri, haveninvented a certain new and useful Improvement in Dough- Mixers, of which the following is a full,

clear, and exact description, such as will en- Fig. 3 is a detail of the dumpingmechanismr Fig. 4 is aside view of the beater arm.

My invention relates toa device for m1xing dough. 1

The principal object-of myinvention is to provide a device of the class described, particularly adapted to thoroughly mixing {the ingredients and to thoroughly develop by said operation all the gluten in the flour.

Another object of my invention is to.pro-' in such a device mixing or kne'ading vide members which are adapted to pull orkn'ead the dough without cutting it.

Afurther object of myiinventioniis toproduce such a device which may be operated with a minimum expenditure of-power.

A still further object of=my invention is to produce such a device adapted :to thoroughly work small batches.

\Vith these objegts inzview my invention consists in the combination and arrangement of parts hereinafter described. and illustrated in the drawings inwhich like reference characters refer to like parts throughout.

My invention contemplates the use of a pair of similar end frames 1, in the upper portions of which are mounted a pair of journal members 2. A hopper 3 is provided with trunnions 4 which are j ournaled in said journal members 2 so as to support said hopper from the end frames 1.

journaleda shaft 9. The sleeves 7 are pro- 7 Specification of Lettersjatent The bottom of the hopper Sis curved on the arc of a circle V Patented-Realm 159 1-6. seriarnavimaa I against the inner facesof 'the end walls l l of the hopper 3. threaded upon the arbors of the sleevesTand beariagainst :theouter ends of; journals :4 of

videdwithcollar portions '10 which bea r Clamping rings 12 are the'hopper. wBy screwing up rings 12, the,

trumiions 40f the hopper 3 are clampedibetween said ri gs and -llars"10. "In :the in-' Her endslofztheltrunnions 4 are set packing rings "lrl which are :pressed against the'collars by small :in-set springs .15. At the medialline of thehopperiii,thereiis mounted 1 upon the shaft 91a heater arm .l6iextending radially-:ofithe shaftand of'len'gthsuchas Just ito clear 'therwallsof the hopper. Ber.- tween :the :beater "arm '16 and the :inner end of :the sleeves 7-7 are interposed short quill sections 18 which are provided at their-lends with packing rings 319 which are pressed I by springsQO against the hub 21 of .the beater arm 16 L1'lCl1th8 ends ofithesleeves 7. Up'on the-sleeves 17 are imounted sarms 2:4;which carry .at their outer: extremities *blades ;or

fiig'hts25 whichareipitched so as to force s -materialtoward the shaftand to convsyzit towardvthe ibeater 'arm '16 whenithey =are iro-r tatedJ These blades sweep *close to the curved wall of :the hoppeivand extend; from the arms-24 towardithe-orbit of the beater arm 'i 16,1aidistance such that the :beater arm 16 in :its:revolution iwill sweep adjacent their inner ends.

One edge of the arm 24 bears against the end*l-1 -'-'of"'-the' hopper and sai'd arm --is pitched backwardv from said'forward edge so as to scrape material from the'end of the hopper and carry it away therefrom. Upon the outer fixed large gear wheels 26 and upon oneend of the shaft 9 is fixed a smaller gear wheel 27; frames I mounted a driving shaft 29. The shaft 29 is driven from a pulley 30 actuated by a belt 31.

driving pinions The shaft 29 carries a pair of small 32 which mesh with the gear Wheels 26 and at one end a larger-driving pinion 34 meshes with the smaller gear wheel 27. seen that the beater arm 16 carried on the shaft 9 will be more rapidly rotated through the gears 34 and 27 than will the v sleeves 7 carrying the flights 25 through the gears 32 and 26.

Upon the curved casing'of thehopper 3 is 110 Below thehopper 3 in the end I are journals 28 in which are By this arrangement, it will be ends of the sleeves 7 are be seen that the operation of my mounted an arcuate rack meshes a worm screw 36 carried shaft 37 mounted in the endframes 1. The stub shaft 37 is con nected by a universal joint 39'with the shaft 40 of a hand wheel 41 which is journaled in a bracket 42. a V x g V i The arrangement of the parts just described is such that when the worm gear 36 is rotated by means of the hand wheel 41, the hopper 3 is rocked by virtue of the engagement of the rack 35 and the worm gear 36.

as thus constructed and assembled, itwill device is as follows: The hopper 3 being in its upright. position, the ingredients for the mixture are placed-therein. Through the transby stub mission pulley 30, thedriving shaft 29,

4 through the gears a greater speed 32 and 26, rotates the sleeves 7 carrying the mixture and forcing it toward the shaft and the beater arm 16. The beater arm 16 operating between theblades 25 is rotated at are the blades. By the co'clperation of the rapidly revolving beater arm 16 and the flights 25, the ingredients are thoroughly worked over and ,IHIXGCl, the dough being kneaded and pulled out between them but not cut or chopped ,up. "When a hatch has been properly mixed, it may be discharged from the hopper 3 by rotatingthe hand wheel ll which tilts the hopper itsinner side is readily accessible- The doughmay then be dumped from the hopper readily as the beater arm 16 ,being substantially straight and free from any cross members or projections, has nothing to catch it and interfere with its removal.

I am aware that changes in the structure may be made 1n the device illustrated with-1 Copies of 35 with which brackets 38011 one of ed therein in position the blades 25, stirring,

by the gearing 3 l-27 than.

so I that out departing from the scope of my inven' tion.

I claim:

1. Adevice of the 'class described comprising a hopper,

an arm revolubly mountto cooperate with an end wall, a blade on the arm and projecting laterally thererrom and formed to cooperate with a wall of the hopper to con ey material horizontally within the hopper, a heater arm revolubly mounted within said hopper and operating adjacent the extremity of said mixing blade,means for revolving said mixing blade within said hopper, and means within said hopper but at a greater speed, whereby dough may be engaged by said blade and said arm and pulled and drawn out in the kneading open ation.

A machine of the class described comprising a hopper, a driving member extending thereinto, a pair of mixing blades rev olubly mountedthereon and spaced apart therefrom and each cotiperating withadjacent sides of the hopper to feed dough horizontally within said hopper, a heater arm revolubly mounted within said hopper. intermediate the inner mixing blades and adapted to cOGperate therewith to WILLIAM Gr; inner-morn lVitnesses M. O. SQMITILQ Jnssin CLARIL:

this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C.

for revolving said heater arm 1n the same dlrection:

extremities of said knead and pull out dough, and 5 means for revolving said blades and stud 

